Reads individual wheel speeds in real-time to pinpoint failing hub sensors.
The software was also widely distributed as part of the software bundles that came with many generic ELM327 interfaces sold on Amazon and other retailers. It was frequently listed alongside other free tools like OBD Gauge for PalmOS and OBD Logger , giving it broad exposure to new users. This pairing of a low-cost hardware adapter with free, open software was the catalyst that empowered a generation of car enthusiasts.
In the world of OBD-II diagnostics, most basic scanners rely on "Mode 01" data, which is the federally mandated generic information required for emissions testing. This includes basic engine RPM, coolant temperature, and oxygen sensor readings. However, GM vehicles utilize , a proprietary diagnostic mode that allows for "Enhanced Data."
Communicates directly with GM ECMs/PCMs to retrieve enhanced parameters. gm mode 22 scan tool by terry
What are you trying to diagnose (e.g., transmission, engine)?
Ensure your vehicle’s battery is fully charged (or connect a maintainer) while running deep diagnostic routines. A voltage drop can interrupt data streams or briefly cause modules to lose communication.
: It allows users to request specific Parameter IDs (PIDs) from various vehicle control modules, including the Engine Control Module (ECM) and Transmission Control Module (TCM). Accessibility Reads individual wheel speeds in real-time to pinpoint
: Due to its small file size (approx. 1.49Mb), it is easy to install and deploy on older hardware. Limitations ELM327 Software - Interfuse LLC.
The "GM Mode 22 Scan Tool by Terry" originated within automotive coding forums, specifically across communities dedicated to platforms like the Pontiac Grand Prix, Chevy Corvette, and late-1990s to mid-2000s GM trucks.
For automotive enthusiasts, DIY mechanics, and professional technicians working on General Motors vehicles, access to deep-level data is essential. While standard OBD2 scanners can read basic check engine lights, they often fail to display the "Extended" or "Enhanced" data parameters needed to troubleshoot complex engine, transmission, or ABS issues. This is where the GM Mode 22 Scan Tool by Terry Go to product viewer dialog for this item. comes in. This pairing of a low-cost hardware adapter with
As a beta project shared for free, the software had its share of growing pains, which were openly discussed in the ScanTool.net forums, providing a fascinating look at early DIY diagnostics.
Most effective on General Motors vehicles built between 1996 and 2006 (J1850 VPW protocol era). It also supports early CAN-bus GM vehicles up to around 2010.
Based on the existing reputation of "Terry" (likely Terry Johnson of ) and his existing software (Terry's GM Scan Tool), the most logical and high-impact feature to add would be a "Bi-Directional Smart-Actuator Dashboard."